<template>
  <div class="numberPad">
    <div class="output">{{output}}</div>
    <div class="buttons">
      <button @click="inputContent">1</button>
      <button @click="inputContent">2</button>
      <button @click="inputContent">3</button>
      <button @click="shanChu">删除</button>
      <button @click="inputContent">4</button>
      <button @click="inputContent">5</button>
      <button @click="inputContent">6</button>
      <button @click="clear">清空</button>
      <button @click="inputContent">7</button>
      <button @click="inputContent">8</button>
      <button @click="inputContent">9</button>
      <button class="ok" @click="ok">OK</button>
      <button @click="inputContent" class="zero">0</button>
      <button @click="inputContent">.</button>
    </div>
  </div>
</template>

<script lang="ts">
import Vue from 'vue';
import {Component, Prop} from 'vue-property-decorator';
@Component
export default class NumberPad extends Vue{
    @Prop(Number) readonly value!: number;
    output = this.value.toString();
    inputContent(event:MouseEvent){
        const button = (event.target as HTMLButtonElement);
        const input = button.textContent as string;
        if(this.output.length === 16){return;}
        if(this.output === '0'){
            if('0123456789'.indexOf(input) >= 0){
                this.output = input;
            }else{
                this.output += input;
            } 
            return;
        }
        if(this.output.indexOf('.') >= 0 && input==='.'){return;}
            this.output += input;
    }
    shanChu(){
        if(this.output.length === 1){
            this.output = '0';
        }else{
            this.output = this.output.slice(0,-1);
        }
    }
    clear(){
        this.output = '0';
    }
    ok(){
        const number = parseFloat(this.output)
        this.$emit('update:value',number);
        this.$emit('submit',number);
        this.output = '0';
    }
}
</script>

<style scoped lang="scss">
@import "~@/assets/style/helper.scss";
.numberPad{
    .output{
        @extend %clearFix;
        @extend %innerShadow;
        font-size: 36px;
        font-family: Consolas,monospace;
        padding: 9px 16px;
        text-align: right;
        height: 72px;
    }
    .buttons{
        @extend %clearFix;
        > button{
            width: 25%;
            height: 64px;
            float: left;
            background: transparent;
            border: none;
            &.ok{
                height: 64px*2;
                float: right;
            }
            &.zero{
                width: 25%*2;
            }
            $bg:#f2f2f2;
            &:nth-child(1){
                background: $bg;
            }
            &:nth-child(2),&:nth-child(5){
                background: darken($bg,4%);
            }
            &:nth-child(3),&:nth-child(6),&:nth-child(9){
                background: darken($bg,4%*2);
            }
            &:nth-child(4),&:nth-child(7),&:nth-child(10){
                background: darken($bg,4%*3);
            }
            &:nth-child(8),&:nth-child(11),&:nth-child(13){
                background: darken($bg,4%*4);
            }
            &:nth-child(14){
                background: darken($bg,4%*5);
            }
            &:nth-child(12){
                background: darken($bg,4%*5);
            }                
        }

    }
}
</style>
